<h4>Tool</h4><table border="0"><tr><td valign="top"><b>Name</b></td><td valign="top">Flatten Polygon Layer</td></tr><tr><td valign="top"><b>ID</b></td><td valign="top">21</td></tr><tr><td valign="top"><b>Author</b></td><td valign="top">O.Conrad (c) 2014</td></tr></table><hr><h4>Description</h4>Removes invalid polygons, i.e. polygons with less than three vertices, and merges polygons belonging spatially together, i.e. forming outer and inner rings. Inner rings are not preserved as separate polygon, but become new part of the polygon forming the outer ring. <hr><h4>Parameters</h4><table border="1" width="100%" valign="top" cellpadding="5" rules="all"><tr><th>Name</th><th>Type</th><th>Identifier</th><th>Description</th><th>Constraints</th></tr>
<tr><th colspan="5">Input</th></tr><tr><td>Input </td><td>Shapes (input)</td><td>INPUT</td><td></td><td></td></tr><tr><th colspan="5">Output</th></tr><tr><td>Output (*)</td><td>Shapes (optional output)</td><td>OUTPUT</td><td></td><td></td></tr></table>(*) <i>optional</i>